What is the recommended humidity level range for indoor pools and spas?

The recommended humidity level range for indoor pools and spas is 40 to 60%. This range is important for several reasons. First, maintaining humidity within this range helps prevent excessive moisture buildup in the air, which can lead to mold growth, deterioration of building materials, and increased maintenance costs. Additionally, proper humidity levels contribute to swimmer comfort; too dry of an environment can lead to dry skin and respiratory discomfort, while too much humidity can make the air feel stuffy and can inhibit evaporation from the pool surface.

A humidity level of 40 to 60% strikes a balance that helps protect the facility while ensuring a pleasant experience for swimmers. This range is widely recognized in industry standards, which guide pool operators to create a safer and more comfortable environment for guests.